NEW YORK (AP)—Serena Williams thought she was treated more harshly by the chair umpire in the U.S. Open final than a man would have been.

Williams was cited by official Carlos Ramos for three code violations during her 6-2, 6-4 loss to Naomi Osaka on Saturday: for getting coaching signals; for breaking her racket, which cost her a point; and for calling the chair umpire a thief, which cost her a game.

“I've seen other men call other umpires several things. I'm here fighting for women's rights and for women's equality and for all kinds of stuff. For me to say ‘thief,' and for him to take a game, it made me feel like it was a sexist remark. He's never taken a game from a man because they said ‘thief,”' Williams said at her news conference.

Earlier, as Williams pleaded her case on court with tournament referee Brian Earley, calling the penalties unfair, she said: “Because you're a woman, you're going to take this away from me?”

“There's a lot of men out here that have said a lot of things,” Williams said, “and because they are men, that doesn't happen.”

Two-time Australian Open champion and two-time U.S. Open runner-up Victoria Azarenka backed up Williams' stance, writing on Twitter : “If it was men's match, this wouldn't happen like this. It just wouldn't”

There have been a series of recent happenings that illustrate the ways in which tennis does do things differently for men and women.

Just before the U.S. Open, the French tennis federation president said that the black catsuit worn this year by Williams at the French Open would not be allowed at that tournament in the future. During the U.S. Open, a female player, Alize Cornet, was incorrectly admonished by a chair umpire for changing her shirt during a match, which is allowed—and which men do all the time. And the U.S. Tennis Association created a new rule last week that allows for a 10-minute break in men's matches when the heat and humidity are too harsh; previously, only women were given that chance for a delay.

“I just feel like the fact that I have to go through this is just an example for the next person that has emotions, and that want to express themselves, and want to be a strong woman. They're going to be allowed to do that because of today,” Williams said. “Maybe it didn't work out for me, but it's going to work out for the next person.”